<StackLayout sdkToggleNavButton>
<!-- >> action-bar-title-icon-html -->
<ActionBar title=" NativeScript" android.icon="res://icon" android.iconVisibility="always">
    <NavigationButton icon="res://ic_arrow_back_black_24dp" (tap)="goBack()"></NavigationButton>
</ActionBar>
<!-- << action-bar-title-icon-html -->
</StackLayout>